Method of operating pearlknitting machines



Sept. 17, 1940.

METHOD OF OPERATING PEARL-KNITTING MACHINES Filed March 18, 1938 v. w.MEHNERT 2,215,082

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Patented Sept. 17, 1940 PATENT OFFICE METHOD or OPERATING PEARL-KNITTING MACHINES Volkhart Walter Mehnert, Siegmar- Schonau, Germany IApplication March 18, 1938, Serial No. 196,724

In Germany March 20, 1937 2 Claims.

The invention relates to pearl-knitting machines and to a method ofoperating same, and more particularly to pearl-knitting machinesdisclosed in the U. S. Patent No. 2,087,650, dated July 20,- 1937.pushers holding and conducting the needles at their heads possess aprolongation or extension projecting forward across the opened latch ofthe needle when coupled and having a knife edge at the bottom surface.By means of these extensions the needle latches are opened and theneedles kept at the bottom of the needle channel without the use offurther needle covers.

It is an object of the present invention to create further possibilitiesin a machine of that kind in that the stitches can be transferred fromone needle to another by means of the pushers. It is a further object ofthe invention to enable this transferring of individual stitches to beeffected during the working stroke.

Further details of the invention are made more fully apparent inconnection with the acto the invention,

Figs. 2-6 the process of transferring a stitch from the needle to thepusher in its Various stages,

Fig. 7 a modified embodiment of the end of 'the pusher on larger scale,and

Fig. 8 is a perspective front end view of the front portion of a pusher.

As shown in Fig. l, the pusher has substantially the same shape as inthe above mentioned Patent 2,087,650. The front edge I!) of theextension I projecting beyond the coupling recess 2 is inclined andforms an acute angle with the lower side 28 of the extension. The edgeI28 (see Figs. 1 and 8) between the front edge It] and the lower side 20is sharp and forms a lower knife edge spaced from the bottom slidingedge 2| by an amount equal to the height h of the double ended needle 5(see Fig. 2). According to the present invention, the inclined frontedge i0 is provided with a notch 3 near According to said patent theinto the position in which the needle head 9 coincides with theloop-forming member II as illustrated in Fig. 3.

Thereupon the pushers 4 and needles 5 selected by, the Jacquardattachment are pushed forward through the stitches into the positionshown' in Fig. 4 in which the stitch 1 is placed behind the latch 6. Theselected appertinent pusher 8 of the opposite bed is now driven so fartowards the needle 5 that the'notch 3 at its front end is placed abovethe needle head 9. Then the needle 5 is withdrawn by the pusher 4, theappertinent pusher 8 being carried forward with the same speed so thatthe notch 3 maintains its positionin relation to the needle head 9 andno change of the relative position between the needle 5 and theappertinent pusher 8 occurs. During this movement the stitch I slides onthe needle 5 and closes the pivoted latch 6, and the free end ofthelatter abuts against the inclined front edge l8 being in front of thenotch 3 and in the path of the latch Ii. The stitch I having closed thelatch 6 slides along the latter into the notch 3 of the pusher 8 asshown in Fig. 5.

Finally the pusher 8 is again slightly withdrawn into the position ofFig. 6 in which the stitch resting in the notch 3 is situatedapproximately half way between the loop-forming members ll of both beds.

In Fig. 6 the stitch I2 is to be seen lying on an adjacent needle 5'.

After completing the described process of operation the carriage hasarrived at the end of its stroke. The needle beds are now displacedrelative to each other by the spacing of a needle division. Upon thereturn stroke of the carriage the needle 5' holding the stitch I2 ispushed forward by the pusher 4' and conducted through that stitch I nowfacing it. The needle 5 carrying the'stitch l2 now receives also thestitch I,

, so that both stitches are placed on the same needie; the needles 5which had given off their stitches during the preceding stroke may now,by appropriate Jacquard selection, remain without stitches. I

According to Fig. '7 illustrating a different embodiment of the pusher,the end of the prolongation I has, apart from the notch 3 at the upperside, a shallow indentation l3 at the lower side 1 20 near the lowerknife edge I20. Said indentation I3 serves to receive the head 9 of theneedle 5 when the pusher 8 is in the position shown in Fig. 7, in whichthe notch 3 is substantially above the needle head 9. This engagementbetween the needle head 9 and the pusher 8 serves to hold said parts inalignment. Furthermore,

.the inclined edge ID has the form of a wedge inclined front edge,comprising the steps of forming stitches on the needles, selecting acertain number of needles and transferring the stitches therefrom to thenotches of correspondingly selected appertinent pushers opposite saidneedles during the stroke of the carriage in one direction, displacingthe needle beds relative toeach other by the spacing of a needledivision during the change of the stroke of the carriage from onedirection to another direction so as to place a new number of needlescarrying stitches 'opposite to said selected pushers, and transferringthe first mentioned stitches from said pushers to said new number ofneedles during the stroke of the carriage in the other direction,whereby said first mentioned stitches and said second mentioned stitchesare placed on the same needles.

2. A method of operating a pearl-knitting machine as claimed in claim 1,in which the transfer of the stitches from the selected needles to thenotches of the correspondingly selected appertinent pushers comprisesthe steps of pushing the selected-needles through the stitches so as tobring the stitches behind the opened latches, moving the selectedappertinent pushers into a position in which the notches of the pushersare substantially above the needle heads; withdrawing the needles alongthe needle bed and moving the appertinent pushers without a substantialchange of the relativerposition between the needles andthe appertinentpushers, so that during the withdrawal of the needles the stitches slideon the needles, turn the latches into a position to rest on the inclinedfront edgesof the appertinent pushers and slide along said latches intoI said notches.

VOLKHART WALTER MEHNERT.

